How to Export correctly a standalone Game?
You only need one addon, is "required" that you have everything (textures, videos, others blends, sounds, etc.) in the same folder as your primary blend.



This highlighted files will be create when saving as runtime and they are required to be in the same folder of the .exe, if you are using only one blend and have already packed all external data you still require all that new files.



If you have this type of texture problem that I had while writing this answer:



Notice the next block is not in the same order of the gif

First i open the "blend file" and make paths relative and no change (but lol i has editing the wrong file...) so i pack all into blend and again no chage, then i almost realize and i set the textures names again then pack all and save the file and no change (lol). Finally i change de name of the file to load the want edit and the textures were there:



Disclaimer

I do not know if by repeatedly packing, make the blend file bigger.

Notice the file that i exported to run time is diferent from the one with the textures problem.
In the case of only one file after make the pack or repack, export it again to run time but this time dont need to check the copy of bundle and dlls.